Parkinson's disease is a movement disorder that can cause your muscles to tighten and become rigid, making it difficult to walk and engage in daily activities. It can also also cause memory loss and dementia in some cases....more

Huntington’s disease is a brain disorder in which brain cells, or neurons, in certain areas of the brain start to break down. As the neurons degenerate, the disease can lead to emotional disturbances, loss of intellectual abilities, and uncontrolled movements....more